"Feeder Fresh safely and effectively prevents growth of disease-causing mold to ensure your feeder stays clean, dry, and healthy for birds.
Feeder Fresh is a bird-safe moisture trap and seed preservative that can be used in feeders and seed storage containers to reduce the negative effects of moisture, such as caking, mod and aging. FF will promote the health of wild birds by keeping their feeders dry and reducing the incidence of mold and harmful mold toxins."